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The Disable-DedupVolume cmdlet disables further data deduplication activity on one or more volumes. After you disable data deduplication, the volume remains in a deduplicated state and the existing deduplicated data is accessible. The server stops running data deduplication jobs for the volume and new data is not deduplicated. To undo data deduplication on a volume, use the Start-DedupJob cmdlet and specify Unoptimization for the Type parameter.

After you disable data deduplication on a volume, you can perform all read-only deduplication cmdlet operations on the volume. For example, you can use the Get-DedupStatus cmdlet to get deduplication status for a volume that has data deduplication metadata. After you disable data deduplication on a volume, you cannot use the data deduplication job-related cmdlets and the Update-DedupStatus cmdlet to perform operations on the volume. For example, you cannot use Start-DedupJob to start a data deduplication job for a volume on which you have disabled data deduplication.

-Volume<String[]>

Specifies an array of system volumes for which to disable data deduplication. Specify one or more volume IDs, drive letters, or volume GUID paths. For drive letters, use the format D:. For volume GUID paths, use the format \\?\Volume{{GUID}}\. Separate multiple volumes with a comma.

Example 3: Suspend I/O activity for a specified volume/

This command suspends I/O activity for data deduplication on the specified volume. Effectively, this command causes the data deduplication file system mini-filter to detach from the specified volume. After this command completes, I/O to data deduplication files fails with an ERROR_INVALID_FUNCTION error until either the Enable-DedupVolume -DataAccess command runs, or the restarts.